Yeast extract is used as a foodsource for growing bacterial and
fungal cultures (and also for humans.) Yeast extract has most or
all of the vitamins and minerals that cells need to grow and to
multiply. For human comsumption, yeast extract is mixed with herbs
and spices and used as a sandwich spread. 'Vegemite' is a popular
brand of yeast extract in Australia.
View page
why colony of agrobacterium is pink on yeast extract
View page
The major ingredient for the foodstuff Marmite is yeast extract.
The extract is a by-product of beer production. Similar products
include Vegemite, Cenovis, and Vitam-R.